A cable-stayed bridge, also known as a diagonal bridge, features a structural system where the main beam is directly supported by multiple cables anchored to bridge towers. This system consists of three primary components:

Ideal for crossing large rivers due to its substantial main span capacity.

Suited for small to medium rivers and urban channels with smaller main spans.

Features increased structural flexibility, requiring careful engineering to manage potential excessive deformation.

Solution for managing large bending moments at side spans through extended beams or additional support piers.

The cable tower serves as both a structural element and aesthetic focal point, with various configurations available:

• Single Column: Simple structure suitable for single-plane cables
• A-Shape: Enhanced stiffness along bridge axis
• Inverted Y-Type: Reduces negative bending moment in main beam

• Single Cable Plane: Requires box sections with high torsional stiffness
• Vertical Double Cable Plane: Resists torque through cable axial forces
• Diagonal Double Cable Plane: Excellent wind resistance for spans >600m

• Radial: Concentrated at tower top with large vertical support
• Harp: Parallel arrangement simplifies tower connections
• Sector: Combines advantages of both radial and harp designs

The main beam serves three critical functions:

1. Distributes loads to cables
2. Provides axial compression resistance
3. Transmits transverse wind and seismic forces

• Prestressed Concrete: Economic for spans <400m
• Steel-Concrete Composite: 400-600m spans
• All Steel: >600m spans
• Hybrid: Steel main span with concrete side spans

• Parallel Wire Cable with Cold Cast Anchor
• Parallel Steel Cable with Clip Anchor

1. Pneumatic Control: Surface modifications to prevent rain vibration
2. Damping Reduction: Increased damping ratio through specialized devices
3. Dynamic Characteristic Modification: Cable interconnections

• Support Construction
• Push Construction
• Rotary Construction
• Cantilever Construction (Assembly/Pouring)

• Highway Bridges
• Railway Bridges